2 * Test to see how quickly we can scan the inode table (not doing
19 #include <sys/ioctl.h>
24 #include <sys/resource.h>
26 #if EXT2_FLAT_INCLUDES
31 #include "ext2fs/ext2_fs.h"
32 #include "ext2fs/ext2fs.h"
33 #include "blkid/blkid.h"
36 #include "et/com_err.h"
37 #include "../version.h"
39 struct resource_track
{
40 struct timeval time_start
;
41 struct timeval user_start
;
42 struct timeval system_start
;
44 unsigned long long bytes_read
;
45 unsigned long long bytes_written
;
48 extern int isatty(int);
50 const char * program_name
= "iscan";
51 const char * device_name
= NULL
;
56 int inode_buffer_blocks
= 0;
57 int invalid_bitmaps
= 0;
59 struct resource_track global_rtrack
;
61 void init_resource_track(struct resource_track
*track
, io_channel channel
)
66 io_stats io_start
= 0;
68 track
->brk_start
= sbrk(0);
69 gettimeofday(&track
->time_start
, 0);
72 memset(&r
, 0, sizeof(struct rusage
));
74 getrusage(RUSAGE_SELF
, &r
);
75 track
->user_start
= r
.ru_utime
;
76 track
->system_start
= r
.ru_stime
;
78 track
->user_start
.tv_sec
= track
->user_start
.tv_usec
= 0;
79 track
->system_start
.tv_sec
= track
->system_start
.tv_usec
= 0;
81 track
->bytes_read
= 0;
82 track
->bytes_written
= 0;
83 if (channel
&& channel
->manager
&& channel
->manager
->get_stats
)
84 channel
->manager
->get_stats(channel
, &io_start
);
86 track
->bytes_read
= io_start
->bytes_read
;
87 track
->bytes_written
= io_start
->bytes_written
;
91 static float timeval_subtract(struct timeval
*tv1
,
94 return ((tv1
->tv_sec
- tv2
->tv_sec
) +
95 ((float) (tv1
->tv_usec
- tv2
->tv_usec
)) / 1000000);
98 void print_resource_track(const char *desc
,
99 struct resource_track
*track
, io_channel channel
)
101 #ifdef HAVE_GETRUSAGE
104 struct timeval time_end
;
106 gettimeofday(&time_end
, 0);
109 printf("%s: ", desc
);
111 #define kbytes(x) (((unsigned long long)(x) + 1023) / 1024)
112 #ifdef HAVE_MALLINFO2
114 struct mallinfo2 malloc_info
= mallinfo2();
116 printf("Memory used: %lluk/%lluk (%lluk/%lluk), ",
117 kbytes(malloc_info
.arena
), kbytes(malloc_info
.hblkhd
),
118 kbytes(malloc_info
.uordblks
),
119 kbytes(malloc_info
.fordblks
));
121 #elif defined HAVE_MALLINFO
122 /* don't use mallinfo() if over 2GB used, since it returns "int" */
123 if ((unsigned long)((char *)sbrk(0) - (char *)track
->brk_start
) <
125 struct mallinfo malloc_info
= mallinfo();
127 printf("Memory used: %lluk/%lluk (%lluk/%lluk), ",
128 kbytes(malloc_info
.arena
), kbytes(malloc_info
.hblkhd
),
129 kbytes(malloc_info
.uordblks
),
130 kbytes(malloc_info
.fordblks
));
133 printf("Memory used: %lluk, ",
134 kbytes(((char *)sbrk(0)) - ((char *)track
->brk_start
)));
136 #ifdef HAVE_GETRUSAGE
137 getrusage(RUSAGE_SELF
, &r
);
139 printf("time: %5.2f/%5.2f/%5.2f\n",
140 timeval_subtract(&time_end
, &track
->time_start
),
141 timeval_subtract(&r
.ru_utime
, &track
->user_start
),
142 timeval_subtract(&r
.ru_stime
, &track
->system_start
));
144 printf("elapsed time: %6.3f\n",
145 timeval_subtract(&time_end
, &track
->time_start
));
147 #define mbytes(x) (((x) + 1048575) / 1048576)
148 if (channel
&& channel
->manager
&& channel
->manager
->get_stats
) {
150 unsigned long long bytes_read
= 0;
151 unsigned long long bytes_written
= 0;
154 printf("%s: ", desc
);
156 channel
->manager
->get_stats(channel
, &delta
);
158 bytes_read
= delta
->bytes_read
- track
->bytes_read
;
159 bytes_written
= delta
->bytes_written
-
160 track
->bytes_written
;
162 printf("I/O read: %lluMB, write: %lluMB, "
164 mbytes(bytes_read
), mbytes(bytes_written
),
165 (double)mbytes(bytes_read
+ bytes_written
) /
166 timeval_subtract(&time_end
, &track
->time_start
));
170 static void usage(void)
173 "Usage: %s [-F] [-I inode_buffer_blocks] device\n",
178 static void PRS(int argc
, char *argv
[])
183 extern void *mallwatch
;
187 setbuf(stdout
, NULL
);
188 setbuf(stderr
, NULL
);
189 initialize_ext2_error_table();
192 program_name
= *argv
;
193 while ((c
= getopt (argc
, argv
, "FI")) != EOF
)
199 inode_buffer_blocks
= atoi(optarg
);
204 device_name
= argv
[optind
];
206 int fd
= open(device_name
, O_RDONLY
, 0);
209 com_err("open", errno
,
210 "while opening %s for flushing", device_name
);
213 if ((retval
= ext2fs_sync_device(fd
, 1))) {
214 com_err("ext2fs_sync_device", retval
,
215 "while trying to flush %s", device_name
);
222 int main (int argc
, char *argv
[])
224 errcode_t retval
= 0;
228 __u32 num_inodes
= 0;
229 struct ext2_inode inode
;
230 ext2_inode_scan scan
;
234 retval
= ext2fs_open(device_name
, 0,
235 0, 0, unix_io_manager
, &fs
);
237 com_err(program_name
, retval
, "while trying to open '%s'",
242 init_resource_track(&global_rtrack
, fs
->io
);
244 retval
= ext2fs_open_inode_scan(fs
, inode_buffer_blocks
, &scan
);
246 com_err(program_name
, retval
, "while opening inode scan");
251 retval
= ext2fs_get_next_inode(scan
, &ino
, &inode
);
253 com_err(program_name
, retval
,
254 "while getting next inode");
262 print_resource_track(NULL
, &global_rtrack
, fs
->io
);
263 printf("%u inodes scanned.\n", num_inodes
);